Method for reducing loads in an aerogenerator

A wind turbine and power grid technology, applied in the control of wind turbines, wind turbines, wind power generation, etc., can solve problems such as uncontrolled, harmful wind turbine components, etc., to increase fatigue life, reduce material usage, increase The effect of the safety margin

Inactive Publication Date: 2009-09-16
GAMESA INNOVATION & TECH SA
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  • Summary
  • Abstract
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Problems solved by technology

[0003] In extreme wind gusts and / or emergency situations such as disconnection of the generator from the grid, failure of its components, the known prior art considers the control system to stop the wind turbine by bringing the blades to the feathered position as quickly as possible, thus, Although this emergency shutdown is usually very brief, it is also uncontrolled and harmful to some components of the wind turbine

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  • Method for reducing loads in an aerogenerator
  • Method for reducing loads in an aerogenerator
  • Method for reducing loads in an aerogenerator

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Embodiment Construction

[0019] Such as figure 1 As shown in , the action of the Mexican hat gust combined with the extreme load case of wind turbine disconnection from the grid is defined by the characteristics of the gust and the moment of disconnection of the wind turbine from the grid. The actual situation of extreme loads considered in the IEC standard refers to: (1) the wind turbine is disconnected when the gust is at an initial speed of 12m / s, which may be at the beginning of the phenomenon; (2) when the gust is at a minimum Wind turbine disconnected at wind speed (first wind valley); (3) Wind generator disconnected when gust accelerates; (4) Wind generator disconnected when gust is at maximum wind speed. Likewise, the same wind turbine disconnection point from the grid can also be considered and defined for a Mexican hat gust with an initial wind speed of 25 m / s.

[0020] Such as figure 2 As shown in , during the disconnection of the wind generator (14) from the grid or during a power outag...

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Abstract

The invention relates to a method for reducing loads in an aerogenerator when disconnected from the power grid during a wind gust, employing a three-loop control system which can be used to correct the speed at which the blades are moved to the feathered position during a controlled emergency shutdown, using a non-linear law taking account of the position of the blades, the vibration of the tower and the generator rotation speed limits.

Description

technical field [0001] The present invention relates to a load reduction method in a wind generator, in particular to a load reduction method in a wind generator during a controlled emergency shutdown during gust action combined with grid disconnection. This load reduction method is based on adjusting the speed at which the wind turbine blades move to the feathered position. Background technique [0002] Variable speed wind turbines with blade pitch change control are known in the prior art. These control sections generally consist of at least a pitch change motor and a transmission connected to a control device which receives data from wind turbine components and sends signals to the pitch change motor to optimize the power produced according to the allowable and at the same time in gust Or some strategies to protect the wind turbine itself in an emergency by turning the blades around their longitudinal axis. [0003] In extreme wind gusts and / or emergency situations such...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/04F03D7/02
CPCF05B2270/107Y02E10/723F05B2270/334F03D7/0264F03D7/0224F05B2270/1071F05B2270/327F05B2270/322F03D7/043F05B2270/328F03D7/0256F03D7/0296Y02E10/72F03D7/022F03D7/04
Inventor 迭戈·奥塔门迪克拉拉蒙特埃米利奥·埃斯卡兰特阿罗约赫马·罗德里格斯帕罗弗朗西斯科哈维尔·埃查尔特卡斯克罗
Owner GAMESA INNOVATION & TECH SA
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